Electrochemical noise analysis to identify the corrosion type using the Stockwell transform and the Shannon energy

Abstract In this research, a new method to identify the corrosion types (generalized, mixed, localized, and the passivation situation) is proposed. The proposed method is based on the electrochemical noise analysis using the Stockwell transform and Shannon energy. To develop the experimental analysis, the 6061-T6 aluminum was exposed to three different corrosive media: 15% H 2 SO 4 , 3.5% NaCl and diH 2 O. The experimental results using the Stockwell transform presented a better classification than the performed by Wavelet transform.